What is the difference between the terms ‘Tier’ and ‘Stage’ when it comes to emissions regulations?
The EPA and the EU have slightly different nomenclature to refer to emissions regulations. The EPA uses the term ‘Tier’ and the EU refers to ‘Stages’. New Holland has chosen to use the term Tier. Tier 4A, which is sometimes referred to as Tier 4 interim, is the equivalent to Stage 3B and Tier 4B is the equivalent to Stage 4.
